//package enumerations;// enumerations/Tanks.java
//// (c)2021 MindView LLC: see Copyright.txt
//// We make no guarantees that this code is fit for any purpose.
//// Visit http://OnJava8.com for more book information.
//// {NewFeature} Preview in JDK 17
//// Compile with javac flags:
////   --enable-preview --source 17
//// Run with java flag: --enable-preview
//import java.util.*;
//
//enum Type { TOXIC, FLAMMABLE, NEUTRAL }
//
//record Level(int percent) {
//  Level {
//    if(percent < 0 || percent > 100)
//      throw new IndexOutOfBoundsException(
//        percent + " percent");
//  }
//}
//
//record Tank(Type type, Level level) {}
//
//public class Tanks {
//  static String check(Tank tank) {
//    return switch(tank) {
//      case Tank t && t.type() == Type.TOXIC
//        -> "Toxic: " + t;
//      case Tank t && (                 // [1]
//          t.type() == Type.TOXIC &&
//          t.level().percent() < 50
//        ) -> "Toxic, low: " + t;
//      case Tank t && t.type() == Type.FLAMMABLE
//        -> "Flammable: " + t;
//      // Equivalent to "default":
//      case Tank t -> "Other Tank: " + t;
//    };
//  }
//  public static void main(String[] args) {
//    List.of(
//      new Tank(Type.TOXIC, new Level(49)),
//      new Tank(Type.FLAMMABLE, new Level(52)),
//      new Tank(Type.NEUTRAL, new Level(75))
//    ).forEach(
//      t -> System.out.println(check(t))
//    );
//  }
//}
